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Missouri Biology EOC

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.

What are the possible genotypes for this cross?
(Click the picture to see it without the text)

a)

TT = 25% Tt= 50% tt=25%

b)

all tall

c)

TT= 75% tt = 25%

d)

Tt = 100%

2.

An offspring will receive how many alleles from each parent to determine a specific trait?

a)

one

b)

two

c)

three

d)

five

3.

Which of the following is a phenotype?

a)

BB

b)

Bb

c)

bb

d)

Blue eyes

4.

Incomplete dominance means that the traits are

a)

expressed equally

b)

dominant

c)

recessive

d)

blended

5.

One form of a gene is called_______________

a)

DNA

b)

Phenotype

c)

trait

d)

allele

6.

If green is dominant over purple, then what is the genotype for this individual?

a)

Purple

b)

Green

c)

GG

d)

gg

7.

In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

a)

Tall = T
Short = S

b)

Tall = T
Short = t

c)

Tall = t
Short = T

d)

Tall = TT
Short = tt

8.

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

a)

0%

b)

25%

c)

50%

d)

75%

9.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

10.

If you cross a black guinea pig with a white guinea pig and the offspring are gray, what type of dominant trait would that be.

a)

incomplete dominance

b)

codominance

c)

codependant

d)

cooperative

11.

What percent of the offspring would be tan when you cross BbxBb?

a)

75%

b)

25%

c)

50%

d)

100%

12.

In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?

a)

It is BB.

b)

It is Bb

c)

It is brown

d)

It is bb.

13.

Which of the following is an example of a homozygous recessive genotype?

a)

AA

b)

Aa

c)

aa

d)

aA

14.

In a dihybrid cross between two heterozygous individuals (AaBb x AaBb), what is the probability of obtaining an offspring with the genotype Aabb?

a)

1/16

b)

1/8

c)

1/4

d)

3/16

15.

Which process is responsible for the separation of homologous chromosomes during meiosis?

a)

Mitosis

b)

Cytokinesis

c)

Anaphase I

d)

Telophase II